Content output system, information display apparatus, content output apparatus, and content information display method

ABSTRACT

A content output system includes a content output apparatus; and an information display apparatus, the content output apparatus and the information display apparatus being capable of communicating with each other. The content output apparatus includes a selection section configured to select, in response to a selection instruction, one piece of content from among a plurality of pieces of content that can be output, as content composed of a video signal and/or an audio signal; and an output section configured to output the content selected by the selection section. The information display apparatus includes a display section; and a control section configured to allow the display section to display, as content information display, information on the plurality of pieces of content that can be output from the content output apparatus in a state in which content that is output from the output section of the content output apparatus is displayed so as to be distinguished from remaining pieces of content that can be output.

CROSS REFERENCES TO RELATED APPLICATIONS

The present invention contains subject matter related to Japanese PatentApplication JP 2005-352189 filed in the Japanese Patent Office on Dec.6, 2005, the entire contents of which are incorporated herein byreference.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a content output system, an informationdisplay apparatus, a content output apparatus, and a content informationdisplay method. More particularly, the present invention relates todisplay of information about content of television broadcast programs,recorded broadcast programs, and various other kinds of video and audio.

2. Description of the Related Art

In recent years, household appliances, such as television receivers,video recorders, personal computers, and audio players, have beenconfigured as a networked system in a house and the like, so that eachdevice can function in such a way as to be synchronously operated in anorganic (cooperation of constituent elements forming a whole) manner.

In such a network, functions for enabling a user to enjoy various kindsof content, such as a television broadcast program that is beingreceived, a recorded program, video/audio recorded on a medium such as aDVD (Digital Versatile Disc), or music, with a high degree of freedom,are realized.

Examples of such networks include a wireless LAN (Local Area Network)and a wired LAN. Examples of specifications for transmitting orreceiving data on a LAN include a protocol that is formed as aspecification by DLNA (Digital Living Network Alliance).

Regarding a television broadcast, information about program content canbe electronically obtained by means of an EPG (Electronic Program Guide)and can be then presented to a user. This EPG can also be effectivelyused in the above-described home network. For example, by performing anoperation on an EPG displayed on a television receiver, a remotecontroller or the like, it is possible for the user to select a desiredprogram and to perform a scheduled program recording with a videorecorder for use therewith.

Examples of the related art include Japanese Unexamined PatentApplication Publication No. 1996-22653.

SUMMARY OF THE INVENTION

Viewing of a television broadcast will be described as a non-limitingexample. When the user is viewing a broadcast program of a particularchannel or is changing a channel, in order to know what is the kind ofprogram currently being viewed, the user often wants to confirm theprogram title, the content, performers and the like.

In the present situation, in order to confirm the kind of programcurrently being viewed, the user needs to confirm the channel currentlybeing viewed and the time, and needs to search through theradio/television column carried in a newspaper or a magazine. This istroublesome, and also, if a newspaper or the like is not at hand, it isnot possible to immediately know what is the kind of program.

Of course, EPG display may be performed, for example, by causing atelevision receiver that the user is currently viewing or another deviceto display the EPG. However, similarly, the user himself/herself needsto confirm the information of the program currently being viewed fromthe channel and the time. Some systems or devices are not ready forperforming EPG display, or if EPG display is performed by the televisionreceiver being viewed, the program video is obstructed during that timeby the EPG display, which is inconvenient.

That is, in the present situation, there is no technique for easily andsimply obtaining information about the broadcast program that the useris viewing, and this is inconvenient.

In the foregoing, an example in which a broadcast program is beingviewed is described. The same applies to a case in which, for example,when a recorded program or the like is being reproduced, the user wantsto confirm information about the program and the like.

Accordingly, when content, such as a broadcast program or a recordedprogram, is output and a user views it, it is desirable to allow theuser to easily confirm information on the content, so that convenienceis improved.

According to an embodiment of the present invention, there is provided acontent output system including: a content output apparatus; and aninformation display apparatus, the content output apparatus and theinformation display apparatus being capable of communicating with eachother. The content output apparatus includes selection means forselecting, in response to a selection instruction, one piece of contentfrom among a plurality of pieces of content that can be output, ascontent composed of a video signal and/or an audio signal; and outputmeans for outputting the content selected by the selection means. Theinformation display apparatus includes a display; and control means forallowing the display means to display, as content information display,information on the plurality of pieces of content that can be outputfrom the content output apparatus in a state in which content that isoutput from the output means of the content output apparatus isdisplayed so as to be distinguished from remaining pieces of contentthat can be output.

The information display apparatus according to an embodiment of thepresent invention may include: communication means for communicatingwith external devices; display means; and control means for allowing thedisplay means to display, as content information display, information ona plurality of pieces of content that can be output from the contentoutput apparatus that is an external device in a state in which contentthat is output from the content output apparatus is displayed so as tobe distinguished from remaining pieces of content that can be output.

The information display apparatus may further include operation means,wherein the control means allows the communication means to transmit aselection instruction to the content output apparatus in response tooperation of the operation means, makes a determination as to whatcontent is to be output by the content output apparatus on the basis ofa selection instruction in response to operation of the operation means,and allows the display means to perform the content information displayin a state in which the content is displayed so as to be distinguishedfrom remaining pieces of content that can be output.

By receiving, via the communication means, notification informationnotifying what output content is to be transmitted from the contentoutput apparatus, the control means may make a determination as to whatcontent is to be output by the content output apparatus and may allowthe display means to perform the content information display in a statein which the content is displayed so as to be distinguished fromremaining pieces of content that can be output.

The control means may display in highlight, as the content informationdisplay, information on content that is output by the content outputapparatus, on a display of a list of a plurality of pieces of contentthat can be output from the content output apparatus.

The control means may perform, as the content information display,display of a list of a plurality of pieces of content that can be outputfrom the content output apparatus, and enlarged display of informationon content that is output from the content output apparatus.

When display of a list of a plurality of pieces of content that can beoutput from the content output apparatus is being performed by thedisplay means, the control means may allow, in response to contentoutput from the content output apparatus, the display means to performthe content information display in a state in which content that isoutput by the content output apparatus is displayed so as to bedistinguished from remaining pieces of content that can be output.

When display of a list of a plurality of pieces of content that can beoutput from the content output apparatus is not being performed by thedisplay means, the control means may allow the display means to performthe display of the list when changing of content that is output by thecontent output apparatus or starting of content output is detected, andmay allow the display means to perform the content information displayin a state in which content output from the content output apparatus isdisplayed so as to be distinguished from remaining pieces of contentthat can be output. In this case, the control means may determinewhether or not the content information display should be performed inresponse to display setting.

According to another embodiment of the present invention, there isprovided a content output apparatus including: communication means forcommunicating with external devices; selection means for selecting onepiece of content from among a plurality of pieces of outputable content,as content composed of a video signal and/or an audio signal, inresponse to a selection instruction; output means for outputting thecontent selected by the selection means; and control means for allowingthe communication means to transmit, to an external device, notificationinformation of content that is selected by the selection means and thatis output by the output means.

According to another embodiment of the present invention, there isprovided a content information display method for use with a contentoutput system including a content output apparatus; and an informationdisplay apparatus, the content output apparatus and the informationdisplay apparatus being capable of communicating with each other. Thecontent information display method includes the steps of: selecting andoutputting one piece of content from among a plurality of pieces ofcontent that can be output from the content output apparatus, as contentcomposed of a video signal and/or an audio signal, in response to aselection instruction; and displaying information on the plurality ofpieces of content that can be output from the content output apparatuson the information display apparatus in a state in which content that isoutput by the content output apparatus is displayed so as to bedistinguished from remaining pieces of content that can be output.

That is, in an embodiment of the present invention, information aboutcontent that is selected and output by the content output apparatus isdisplayed so as to be distinguished from remaining pieces of contentthat can be output within a list display on the information displayapparatus.

Content referred to in an embodiment of the present invention refers todata, such as a broadcast program to be received, a recorded program,and music, which is composed of video and/or audio content and which isviewed or listened to by the user. The content output apparatus selectsand outputs one of a plurality of pieces of content. A broadcast programwill be described as an example. A broadcast program from each broadcaststation is content that can be output, and a channel change correspondsto an operation of selecting content that is to be output. At this time,if information on the broadcast program that is selected and outputwithin each of outputable broadcast programs, is displayed on theinformation display apparatus side, it is possible for the user toconfirm, on the information display apparatus side, the information onthe broadcast program that is output by the content output apparatuswhen a channel change is performed. Regarding such a broadcast program,on the information display apparatus side, EPG display can be used as alist display. In that case, by explicitly displaying in highlight, etc.,information about a broadcast program (that is, a broadcast programbeing viewed by the user) that is output on the content output apparatusside, it is possible for the user to recognize the information on theprogram in the EPG display.

According to embodiments of the present invention, since informationabout content that is output by the content output apparatus isdisplayed so as to be distinguished from remaining pieces of contentthat can be output on the information display apparatus side, the usercan easily confirm the identity of content being viewed, for example,content of a broadcast program. For example, when a television receiveris used as the content output apparatus according to an embodiment ofthe present invention and a remote controller device having a displayfunction is used as the information display apparatus according to anembodiment of the present invention, when the user views a televisionbroadcast or performs a channel change, the user can confirm what thebroadcast content is by using the remote controller device, which isvery convenient.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is an illustration of a network configuration according to anembodiment of the present invention;

FIG. 2 is a block diagram of an IP remote controller according to anembodiment of the present invention;

FIG. 3 is an illustration of a software configuration of the IP remotecontroller according to an embodiment of the present invention;

FIG. 4 is a block diagram of a television receiver and a video recorderaccording to an embodiment of the present invention;

FIG. 5 is an illustration of EPG display in the IP remote controlleraccording to an embodiment of the present invention;

FIG. 6 is an illustration of an EPG and highlight display in the IPremote controller according to an embodiment of the present invention;

FIG. 7 is an illustration of an EPG and highlight display in the IPremote controller according to an embodiment of the present invention;

FIG. 8 is a flowchart of an example of processing I when a channelchange operation is performed using the IP remote controller accordingto an embodiment of the present invention;

FIG. 9 is a flowchart of an example of processing II when a channelchange operation is performed using the IP remote controller accordingto an embodiment of the present invention;

FIGS. 10A and 10B are illustrations of an example of processing III whena channel change operation is performed using the IP remote controlleraccording to an embodiment of the present invention;

FIG. 11 is a flowchart of an example of processing IV when a channelchange operation is performed using the IP remote controller accordingto an embodiment of the present invention;

FIG. 12 is an illustration of enlarged display of program information inthe IP remote controller according to an embodiment of the presentinvention;

FIG. 13 is a flowchart of processing when a channel change operation isperformed on a television receiver side according to an embodiment ofthe present invention;

FIG. 14 is a flowchart of processing when a channel change operation isperformed on a TV remote controller side according to an embodiment ofthe present invention;

FIG. 15 is a flowchart of processing when reproduction is performed by avideo recorder according to an embodiment of the present invention; and

FIG. 16 is an illustration of a recording list and a highlight displaywhen reproduction is performed using a video recorder according to anembodiment of the present invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

Embodiments of the present invention will now be described below in thefollowing order.

-   [1. Home network and example of configuration of each device]-   [2. Example of processing performed when a channel change operation    is performed using IP remote controller]-   [3. Example of processing performed when a channel change operation    is performed using television receiver]-   [4. Example of processing performed when a channel change operation    is performed using TV remote controller]-   [5. Example of processing performed when reproduction operation of    recorded program is performed]-   [6. Advantages of embodiments and modifications]

FIG. 1 shows an example of the configuration of a network systemaccording to an embodiment of the present invention.

The network of FIG. 1 shows an example in which a plurality of devicesare connected in a network so that they can communicate with one anotherin a house, an organization such as a company, or the like. In thiscase, television receivers 1, 2, and 3 and video recorders(recording/reproduction apparatuses) 4 and 5 can communicate with oneanother via a transmission line 8. The transmission line 8 is a wiredtransmission line or a wireless transmission line that constitutes aLAN.

The television receivers 1, 2, and 3 and the video recorders 4 and 5 inthe network can function on a stand-alone basis and can also function ina coordinated manner.

A remote controller 7 transmits a command signal to a specific device,for example, the television receiver 1 by, for example, an infraredmethod.

An access point 6 is connected to the transmission line 8, so that an IP(Internet Protocol) remote controller 10 can communicate with eachdevice in the network via the access point 6.

Each device in the network can be operated by means of an IP remotecontroller 10. The IP remote controller 10 enables transmission andreception of data, such as a command signal and video data, to and fromeach device in a network communication such as a wireless LAN.

The IP remote controller 10 is formed of a small and lightweight housingthat can be held by the user, and includes, for example, a displaysection 11 made of a liquid-crystal panel and various kinds of operationkeys 12. The user can operate each device and view video content byusing the IP remote controller 10.

For example, the IP remote controller 10 is used to allow the televisionreceivers 1, 2, and 3, the video recorders 4 and 5 and the like to besynchronously operated in an organic manner. While the user visuallyconfirms the identity of video content stored in the video recorders 4and 5, which is displayed on the IP remote controller 10, the user canselect video content desired to be reproduced, can change the channelsof the television receivers 1, 2, and 3, and can perform scheduledrecording by specifying a program on the EPG display.

In this embodiment, descriptions are made with the assumption thatexamples of devices corresponding to the content output apparatus arethe television receivers 1, 2, and 3, and an example of the informationdisplay apparatus is the IP remote controller 10.

FIG. 2 shows the internal configuration of the IP remote controller 10.Each section in the apparatus shown in FIG. 2 transmits and receivesdata and a control signal via a bus 20.

A CPU 21 performs computation processes necessary for each section tooperate in the IP remote controller 10 and controls each section. TheCPU 21 performs necessary control on the basis of information onoperation using the operation keys 12, which is detected by an inputswitch matrix section 13.

A ROM/RAM 14 is used to store operation programs of the CPU 21 and tostore various kinds of command information that is output by a remotecontroller. Also, the ROM/RAM 14 is used as a work area for computationprocesses or a buffer area for received data. In this example, an EPGdisplay is performed in the IP remote controller 10, and EPG data isstored in the ROM/RAM 14.

As components of the ROM/RAM 14, various kinds of memory are employedincluding a ROM, a D-RAM, an S-RAM, a non-volatile memory, and the like.

A network communication section 16 performs data communication to andfrom each device in the network, as communication via the access point 6shown in FIG. 1.

A data input/output interface 15 performs, for example, an interfaceprocess for communication with external devices by means of the networkcommunication section 16. For example, the data input/output interface15 performs a predetermined communication formatting process on acontrol signal and data to be transmitted by the CPU 21, transfers themto the network communication section 16 via the bus 20, whereby they aretransmitted. Furthermore, the data input/output interface 15 performs aprocess for inputting various kinds of data received by the networkcommunication section 16 and transfers the data to intended sections(the CPU 21, the ROM/RAM 14, a codec processor 17, a GDP (graphicdisplay processor) 18 and the like) via the bus 20.

The codec processor 17 performs a decoding process, a digital audioprocess, a D/A conversion process, and the like on audio data to beoutput, and supplies an analog audio signal to an amplifier 22 so thataudio output from a speaker 23 is performed.

The GDP 18 performs a process associated with video data to be output, aprocess for drawing various kinds of images, and the like. The videodata processed or generated by the GDP 18 is supplied to the displaysection 11, whereby video display output is performed.

An infrared communication section 19 outputs an operation command signalto external devices by means of an infrared signal.

The configuration of software that functions in the CPU 21 is shown inFIG. 3.

As software functions, as shown in FIG. 3, an OS (Operating System) 30,a network protocol processor 31, a graphics processor 32, a wireless LANprocessor 33, a graphics library 34, a video stream processor 35, aremote device controller 36, a video/audio/image decoder section 37, andan IP remote controller application 38 are formed.

The graphics processor 32 and the graphics library 34 that function inthe system processing by an OS 30 control display operation on thedisplay section 11. Furthermore, the network protocol processor 31 andthe wireless LAN processor 33 control the operation of the networkcommunication section 16 and the data input/output interface 15.

Furthermore, the video stream processor 35 and the video/audio/imagedecoder section 37 control processing associated with video data andaudio data output from the display section 11 and the speaker section23.

The remote device control section 36 controls the operation oftransmitting control information to external devices through networkcommunication.

The IP remote controller application 38 controls the operation oftransmitting control information through network communication and theoperation of outputting an infrared command signal.

The IP remote controller 10 having the above-described configurationenables, for example, various kinds of operations described below to beperformed in the network shown in FIG. 1.

Operation as a normal remote controller that outputs an infrared commandsignal to each of the television receivers 1, 2, and 3 and the videorecorders 4 and 5.

Operation for supplying a control signal to the television receivers 1,2, and 3 and the video recorders 4 and 5 through network communicationas a wireless LAN and for requesting for predetermined operation. Forexample, operation control of individual devices (power switchingon/off, recording, reproduction, receiving channel setting, etc.) andinstructions of related operations are possible. Examples of possiblerelated operations include an instruction of operation of reproducingvideo content by the video recorder 4 and of displaying video content onthe television receiver 2; and an instruction of operation of allowingbroadcast video that is received and demodulated by the televisionreceiver 3 to be recorded by the video recorder 5.

Operation of transmitting a video signal/audio signal that is receivedor reproduced by one of the television receivers 1, 2, and 3 and thevideo recorders 4 and 5 to the IP remote controller 10 and of outputtingvideo/audio by the display section 11 and the speaker section 23 of theIP remote controller 10.

Operation of causing video displayed on the IP remote controller 10 tobe displayed or recorded in the television receivers 1, 2, and 3 and thevideo recorders 4 and 5.

Operation of performing EPG display on the basis of the received EPGinformation. The operations associated with EPG display will bedescribed later.

FIG. 4 shows an example of the configuration of the television receivers1, 2, and 3 and the video recorders 4 and 5 shown in FIG. 1. Here, thetelevision receiver 1 and the video recorder 4 are shown.

The television receiver 1 includes a CPU 41, a network communicationsection 42, a command receiving section 43, an operation section 44, amemory section 45, a tuner section 46, a video/audio processor 47, adisplay section 48, and a speaker section 49.

The CPU 41 performs computation processing necessary for each section inthe television receiver 1 to operate and control each section.

The network communication section 42 has a LAN communication interfacefunction, and the CPU 41 performs communication with each device in thenetwork of FIG. 1 by means of the network communication section 42.

The operation section 44 includes, for example, operation elements, suchas operation keys provided on the television receiver housing.

The command receiving section 43 receives an infrared command signalfrom the TV remote controller 7 of, for example, an infrared method,converts the infrared command signal into an electrical signal, and thensupplies it to the CPU 41. The CPU 41 detects an operation of the userusing the operation section 44 and the TV remote controller 7 andperforms intended control.

The memory section 45 includes a ROM, a D-RAM, an S-RAM, a non-volatilememory, and the like. The memory section 45 is used to store theoperation program of the CPU 41, processing coefficients, settinginformation, EPG data, and the like and is also used as a work area forcomputation processes and used as a buffer area for networkcommunication data.

The tuner section 46 performs a channel selection process and ademodulation process for a received broadcast wave, and obtains streamvideo data as a broadcast program. Various kinds of broadcast methodssupported by the tuner section 46 are known, examples of which are aterrestrial digital broadcast, a terrestrial analog broadcast, and adigital or analog satellite broadcast of BS (Broadcasting Satellite), CS(Communication Satellite) or the like. The tuner section 46 need notnecessarily to be configured to demodulate a broadcast wave received byan antenna, and may be a tuner or a decoder that can accept a so-calledcable television broadcast or a streaming broadcast supplied via anetwork such as the Internet.

Furthermore, in the tuner section 46, EPG data superimposed on thebroadcast signal is separated. The separated and extracted EPG data issupplied to, for example, the memory section 45.

The video/audio processor 47 performs necessary processing in order tooutput, from the display section 48 and the speaker section 49, a videosignal and/or an audio signal serving as a broadcast program, which arereceived by the tuner section 46.

The video recorder 4 includes a CPU 51, a network communication section52, a command receiving section 53, an operation section 54, a memorysection 55, a tuner section 56, a recording/reproduction processor 57,and a recording medium drive 58.

The CPU 51 performs computation processing necessary for each section inthe video recorder 4 to operate and control each section. The networkcommunication section 52 has an interface function for LANcommunication, and the CPU 51 performs communication with each device inthe network of FIG. 1 by means of the network communication section 52.

The operation section 54 includes operation elements, such as operationkeys provided on the housing of the video recorder 4. Furthermore, thecommand receiving section 53 receives an infrared command signal fromthe remote controller of an infrared method supported by the videorecorder 4, converts the infrared command signal into an electricalsignal, and supplies it to the CPU 51. The CPU 51 detects an operationby the user using the operation section 54 and the remote controller,and performs intended control.

The memory section 55 includes a ROM, a D-RAM, an S-RAM, a non-volatilememory, and the like. The memory section 55 is used to store theoperation programs of the CPU 51, processing coefficients, settinginformation, EPG data, recording list information, scheduled recordinglist information, etc., and is also used as a work area for computationprocessing and as a buffer area for network communication data.

In the video recorder 4, the tuner section 56 performs a channelselection process and a demodulation process for received broadcastwaves, and obtains stream video data as a broadcast program. Similar tothe case of the television receiver 1, various kinds of broadcastmethods and reception styles supported by the tuner section 56 arepossible. Examples thereof include a terrestrial digital broadcast, aterrestrial analog broadcast, and a digital or analog satellitebroadcast of BS, CS or the like. Furthermore, the tuner section 56 mayalso be a tuner or a decoder that can accept a cable televisionbroadcast and a streaming broadcast supplied via a network such as theInternet. Also, in the tuner section 56, EPG data is separated, and theseparated and extracted EPG data can also be stored in the memorysection 55.

The recording medium drive 58 is, for example, an HDD (Hard Disk Drive).

The recording/reproduction processor 57 and the recording medium drive58 record and reproduce a broadcast program. That is, when recording isto be performed, the recording/reproduction processor 57 performs apredetermined compression process and an encoding process for recordingpurposes on stream video data obtained by the tuner section 56, andsupplies the stream video data to the recording medium drive 58.

The recording medium drive 58 records the supplied stream video data.

When reproduction is to be performed, the recording/reproductionprocessor 57 performs a decoding process and a decompression process onthe compressed video data read by the recording medium drive 58, andoutputs the video data in the form of the original stream video data.

The recording medium drive 58 may also be, in addition to an HDD,various kinds of recording media, such as an optical disc, a magnetictape, and a solid-state memory.

In FIG. 4, an example of the configuration of the television receiver 1and the video recorder 4 is shown. The other television receivers 2 and3 and video recorder 5 can be configured substantially identically. Ofcourse, the example of the configuration of the television receivers 1,2, and 3 and the video recorders 4 and 5 is not limited to theconfiguration of FIG. 4, and various examples are possible.

In addition to the television receiver and the video recorder, thefollowing various kinds may be connected to the network of FIG. 1: apersonal computer, an audio reproduction device, an audiorecording/reproduction device, a video monitor apparatus having no tunerfunctions, a tuner device for a television broadcast and a radiobroadcast, an audio amplifier device, and a communication device with anexternal network, such as the Internet.

[2. Example of Processing when a Channel Change Operation is Performedusing IP Remote Controller]

In this example, for example, in the above-described network, when auser changes a channel in order to view a television broadcast on thetelevision receiver 1 or the like, the user can confirm the content ofthe broadcast program that is being output in the IP remote controller10.

In the following, a description will be given of an example of operationwhen the television receiver 1 functions as a content output apparatusaccording to an embodiment of the present invention and the IP remotecontroller 10 functions as an information display apparatus according toan embodiment of the present invention. Content referred to herein inthe embodiment of the present invention corresponds to a broadcastprogram of each channel.

Examples of techniques of user operation for changing a channel withrespect to a broadcast program to be viewed by means of the televisionreceiver 1 include a technique for operation using the IP remotecontroller 10, a technique for operation using panel keys (operationsection 44) of the television receiver 1, and a technique for operationusing the TV remote controller 7.

First, examples of operations when a channel change operation isperformed using the IP remote controller 10 will be described asexamples of processing I to IV of the IP remote controller 10.

In the IP remote controller 10, EPG display is performed as informationof broadcast programs.

FIG. 5 shows a state in which EPG display is performed on the displaysection 11, that is, a program table of broadcast stations of eachchannel is displayed. The IP remote controller 10 enables EPG display asshown in FIG. 5 on the basis of the obtained EPG data when the userperforms an EPG display operation.

There are various techniques for obtaining EPG data. As shown in FIG. 4,when the television receiver 1, the video recorder 4, and the like has atuner function, EPG data can be obtained from a broadcast wave. It ispossible for the IP remote controller 10 to continually obtainup-to-date EPG data by allowing the EPG data obtained by the televisionreceiver 1 or the like to be transferred through network communication.

Although not shown in FIG. 1, when a device, such as a personalcomputer, which can be connected to an external network, exists in thenetwork, EPG data can be downloaded from the Internet and the like.Therefore, the downloaded EPG data may be transferred to the IP remotecontroller 10.

Furthermore, if the IP remote controller 10 has a broadcast wavereception function or a function of accessing Internet websites or thelike, it is also possible for the IP remote controller 10 to obtain EPGdata on its own.

A description will now be given below of an example of operation forpresenting information of broadcast content to the user in response tothe operation of changing a channel of a television broadcast by usingsuch EPG data.

FIG. 8 shows an example of processing I when the user operates a channelby using the IP remote controller 10. This processing of FIG. 8 isprocessing of the CPU 21 of the IP remote controller 10. When the useroperates a channel by means of the operation keys 12 in the IP remotecontroller 10 and the CPU 21 detects the operation, the process proceedsfrom step F101 to step F102, where information on the channel to bechanged to is transmitted to the television receiver 1. In this case,the CPU 21 may transmit the channel information to the televisionreceiver 1 through network communication from the network communicationsection 16 or may transmit the channel information as an infraredcommand signal from the infrared communication section 19. As a resultof this processing, the CPU 41 of the television receiver 1 receiveschannel information via the network communication section 42 or thecommand receiving section 43, and performs control of changing a channelto be selected in the tuner section 46. As a result, in the televisionreceiver 1, the program of the channel changed by the user is output,and the user enters into viewing the program.

Next, in step F103, the CPU 21 determines whether or not EPG display iscurrently being performed by the display section 11, as shown in FIG. 5.If EPG display is not being performed, the CPU 21 directly endsprocessing associated with the channel change operation. If EPG displayis being performed, the process proceeds to step F104, where the programinformation on the channel to be changed to is displayed in a highlighton the EPG display. That is, the CPU 21 can make a determination as tothe channel of the program currently being displayed on the televisionreceiver 1 on the basis of the channel information transmitted to thetelevision receiver 1 in response to user operation. Therefore, theprogram information on the channel is displayed in highlights. FIG. 6shows an example in which, as highlight display HL, the programinformation of the current changed channel is displayed so as to bedistinguished from remaining pieces of content that can be output sothat the user can recognize the program information. In the mannerdescribed above, by performing control such that highlight display HL isperformed, processing associated with the channel change operation iscompleted.

When the user performs a channel change operation by using the operationkeys 12 again, processing of FIG. 8 is performed in a similar manner.For example, when an operation of changing from channel 4 to channel 3is performed, in the process of step F104, with respect to the displayof the IP remote controller 10, the program information highlighted ashighlight display HL is changed from FIG. 6 to FIG. 7. For example, whenthe program information of channel 4 has been displayed in highlights asshown in FIG. 6, the highlight display is completed, and the programinformation of channel 3 is displayed in highlights as shown in FIG. 7.

As a result of such processing being performed, it is possible for theuser to confirm the content of the program that is currently beingdisplayed on the television receiver 1 by means of the display on the IPremote controller 10 while operating the IP remote controller 10.

As a result, it becomes easy for the user to determine whether or notthe current program of the channel being viewed is a program desired tobe viewed. There are many cases in which it is difficult to know whetheror not the channel is the channel of the program desired to be viewed,such as when in particular the user is viewing the program shortly afterthe channel has been changed or when the changed channel is showing acommercial message (CM). However, since the current program is beingdisplayed in highlights, it is possible to easily confirm the identityof the program.

Since the EPG display is a display of a list of programs, information onthe programs of the other channels in the same time period can beconfirmed. This is convenient to search for a program desired to beviewed and to search for a program desired to be viewed while somehowchanging the channel.

FIG. 9 shows an example of processing II when the user performs achannel change operation by using the IP remote controller 10. Thisprocessing of FIG. 9 is also processing of the CPU 21 of the IP remotecontroller 10.

Steps F101 to F104 in FIG. 9 are identical to steps F101 to F104 in FIG.8, and accordingly, a duplicated description is omitted.

In this case, the difference of FIG. 9 from FIG. 8 is that, when the CPU21 determines in step F103 that EPG display is not currently beingperformed on the display section 11, the process proceeds to step F105,where the display up to that point is changed to EPG display. Then,after EPG display is performed in step F105, the program information onthe channel to be changed to is displayed in highlight in step F104.

That is, in the example of processing I in FIG. 8, the highlight displayof the program information on the channel to be changed to is performedonly when EPG display is being performed on the display section 11.However, in the example of processing II of FIG. 9, the display inhighlights on the EPG display is performed regardless of the displaycontent on the display section 11 when the channel is changed.

When the EPG display is not being performed when the channel changeoperation is performed and the process proceeds from step F103→stepF105→step F104 and highlight display is performed on the EPG display,thereafter, the display may be continued until some operation by theuser occurs. Alternatively, for example, if a fixed time has passed, thescreen may be returned to the screen content immediately before the EPGdisplay is performed in step F105.

FIGS. 10A and 10B show an example of processing III when the userperforms a channel change operation by using the IP remote controller10.

In the above-described example of processing I of FIG. 8, the programinformation on the channel to be changed to is displayed in highlightonly when the EPG display is being performed when the channel changeoperation is performed. On the other hand, in the example of processingII of FIG. 9 the program information on the channel to be changed to isdisplayed in highlight when the channel change operation is performedregardless of the display state during the change operation.

Which one of these processes is preferable in use differs for each user.Therefore, in an example of processing III, an example is shown in whichwhether or not EPG display should be performed is determined in responseto the display setting by the user when a channel change operation isperformed.

For example, in order to set the display mode when the channel changeoperation is performed, the CPU 21 allows the display section 11 todisplay a program table display setting screen shown in FIG. 10B so thatthe mode is set in response to an input by the user. The CPU 21 storesthe information of the selected mode in the ROM/RAM 14.

On this screen, it is possible for the user to make a selection inadvance so that EPG display is automatically performed when a channelchange operation is performed or EPG display is not automaticallyperformed.

Processing of the CPU 21 for reflecting such display setting is shown inFIG. 10A. Steps F101 to F104 are identical to those of FIGS. 8 and FIG.9. In this case, when the CPU 21 determines in step F103 that EPGdisplay is not currently been performed on the display section 11, theprocess proceeds to step F106, where it is determined whether or not amode in which EPG display is automatically performed when a channelchange operation is performed has been selected. If this mode has notbeen selected, the processing is directly completed. If the mode hasbeen selected, the process proceeds to step F107, where the display upto that point is changed to EPG display, and the program information onthe channel to be changed to is displayed in highlight in step F104.

That is, if the user selects in advance “Automatic display of a programtable is not performed” on the setting screen of FIG. 10B, theprocessing of FIG. 10A becomes similar to that of FIG. 8. On the otherhand, if “A program table is automatically displayed in response to thechange of a channel”, the processing of FIG. 10A becomes similar to thatof FIG. 9.

As a result of the above, processing corresponding to the preference andnecessity of an individual user is performed.

FIG. 11 shows an example of processing IV.

Steps F101 to F103 are identical to those of FIG. 8. In the example ofprocessing IV, when it is determined in step F103 that EPG display isbeing performed, the process proceeds to step F108, where the programinformation on the channel to be changed to is enlarged and displayed.

For example, if the channel is assumed to be changed to channel 3 whenEPG display shown in FIG. 5 is being performed, when the programinformation on the channel is enlarged on the display section 11 asshown in FIG. 12 in step F108, the current program information on thecurrent channel is displayed so as to be distinguished from remainingpieces of content that can be output.

Such an enlarged display also enables the user to easily confirm theprogram content of the current channel.

When it is determined in step F103 that the EPG display is not beingperformed, after the EPG display is performed, the channel may beenlarged and displayed. For example, this is an example in which, afterthe display of FIG. 5 is performed once, the display of FIG. 12 isperformed immediately after that. Alternatively, the display of a listof programs of FIG. 5 and the display of a list of programs of FIG. 12may be switched for each fixed time. In addition, the display of FIG. 5and the display of FIG. 12 may be switched as desired in response touser operation.

Alternatively, in these cases, rather than the display of FIG. 5, thedisplay of FIG. 7 on which the program is displayed in highlight and thedisplay of FIG. 12 may be switched.

In addition, the process of step F103 may be omitted in FIG. 11, so thatthe program information on the channel to be changed to is continuallyenlarged and displayed when a channel change operation is performed.

After the enlarged display of FIG. 12 is performed, if a fixed timepasses, the display may be automatically changed to the original EPGdisplay of FIG. 5 or to the display of FIG. 7 on which the program isdisplayed in highlight.

Furthermore, even if the EPG display is not being performed, when theenlarged display in step F108 is to be performed, the screen may bereturned to the original screen content after a fixed time has passed orin response to user operation.

The execution of such an enlarged display of FIG. 12 may be selected inthe display setting shown in FIG. 10B.

[3. Example of Processing when a Channel Change Operation is Performedon Television Receiver]

Next, a description will be given, with reference to FIG. 13, ofprocessing when the user performs a channel change operation using thepanel operation elements (the operation section 44 of FIG. 4) of thetelevision receiver 1.

FIG. 13 shows processing of the CPU 41 of the television receiver 1 andprocessing of the CPU 21 of the IP remote controller 10.

When the user performs a channel change operation from the operationsection 44 of the television receiver 1 and the CPU 41 detects it, theprocess of the CPU 41 proceeds from step F201 to step F202, where theCPU 41 performs control for changing a channel to be selected in thetuner section 46.

As a result, in the television receiver 1, the program of the channelchanged by the user is output, and the user enters into viewing theprogram.

At this time, in step F203, the CPU 41 notifies the IP remote controller10 of the channel information on the channel to be changed to. That is,the channel information is transmitted as notification information fromthe network communication section 42 to the IP remote controller 10.

On the other hand, when the CPU 21 of the IP remote controller 10receives the channel information from the television receiver 1, theprocess proceeds from step F211 to step F212. Then, it is determinedwhether or not the EPG display is currently being performed on thedisplay section 11. If the EPG display is not being performed, the CPU21 directly ends the processing associated with the channel informationreception. However, if the EPG display is being performed, the processproceeds to step F213, where, if particular program information is beingdisplayed in highlight up to that point, the processing is completed,and the program information on the channel to be changed to is displayedin highlight on the EPG display, as shown in, for example, FIG. 6. Then,the processing associated with the channel information reception iscompleted.

As a result, the user becomes able to confirm, on the IP remotecontroller 10 side, the content of the program that is output inresponse to the channel change operation on the television receiver 1side.

The display operation in the IP remote controller 10 in this casecorresponds to the processing of FIG. 8 described above. The processingdescribed in FIG. 9, FIGS. 10A and 10B, and FIG. 11, or modificationsthereof may also be performed on the IP remote controller 10 side.

[4. Example of Processing when a Channel Change Operation is Performedusing TV Remote Controller]

Next, a description will be given, with reference to FIG. 14, ofprocessing when the user performs a channel change operation on thetelevision receiver 1 by using the TV remote controller 7.

FIG. 14 shows processing of the CPU within the TV remote controller 7,processing of the CPU 41 of the television receiver 1, and processing ofthe CPU 21 of the IP remote controller 10.

When the user performs a channel change operation by using the TV remotecontroller 7, the CPU within the TV remote controller 7 outputs aninfrared signal as a channel change command in step F302 in response tothe detection of user operation in step F301.

When the CPU 41 of the television receiver 1 detects a channel changecommand from the TV remote controller 7, which is received by thecommand receiving section 43, the process proceeds from step F311 tostep F312, where the CPU 41 performs control so that the selectionchannel in the tuner section 46 is changed. As a result, in thetelevision receiver 1, the program of the channel changed by the user isoutput, and the user enters into viewing the program.

At this time, in step F313, the CPU 41 notifies the IP remote controller10 of the channel information on the channel to be changed to. That is,the channel information is transmitted as the notification informationfrom the network communication section 42 to the IP remote controller10.

When the CPU 21 of the IP remote controller 10 receives the channelinformation from the television receiver 1, the process proceeds fromstep F321 to step F322. Then, the CPU 21 determines whether or not EPGdisplay is currently being performed on the display section 11. If EPGdisplay is not being performed, the CPU 21 directly ends the processingassociated with channel information reception. If EPG display is beingperformed, the process proceeds to step F323, where, if particularprogram information has been displayed in highlight up to that point,the processing is completed, and the program information on the channelto be changed to is displayed in highlight on the EPG display, as shownin, for example, FIG. 6. Then, the processing associated with thechannel information reception is completed.

As a result, the user becomes able to confirm, on the IP remotecontroller 10 side, the content of the program that is output inresponse to the channel change operation using the TV remote controller7.

The display operation in the IP remote controller 10 in this casecorresponds to the processing in FIG. 8 described above. The processingdescribed in FIG. 9, FIGS. 10A and 10B, and FIG. 11, or modificationsthereof may also be performed on the IP remote controller 10 side.

[5. Example of Processing when Operation of Reproducing Recorded Programis Performed]

Each of the above-described examples shows an example in which programcontent is displayed so as to be distinguished from remaining pieces ofcontent that can be output within the EPG display in the IP remotecontroller 10 in response to a channel change in the television receiver1. In addition, when content is to be reproduced by the video recorder4, that is, when a recorded program is to be reproduced, the informationon the content to be reproduced and output can also be displayed so asto be distinguished from remaining pieces of content that can be outputby means of the IP remote controller 10.

An example of processing in this case is shown in FIG. 15.

FIG. 15 shows processing of the CPU 51 of the video recorder 4 andprocessing of the CPU 21 of the IP remote controller 10. Content to berecorded in or reproduced from the video recorder 4 is assumed to be abroadcast program to be recorded.

When the user has performed an operation of reproducing particularcontent recorded in the recording medium drive 58 by using the operationsection 54 of the video recorder 4, a remote controller corresponding tothe video recorder 4 or the like, and when the CPU 51 detects theoperation, the process proceeds from step F401 to step F402. In thisstep, the CPU 51 performs control so that the recording medium drive 58and the recording/reproduction processor 57 are controlled to performcontrol to reproduce a specified recorded program.

As a result, the recorded program reproduced from the recording mediumdrive 58 is transferred to, for example, the television receiver 1 orthe like and is output, and the user enters into viewing the recordedprogram.

At this time, in step F412, the CPU 51 notifies the IP remote controller10 of a recording list and information of a recorded program to bereproduced, which is selected from among the recording list by theabove-described operation. That is, a recording list and information ofa program to be reproduced are transmitted as the notificationinformation from the network communication section 52 to the IP remotecontroller 10.

When the CPU 21 of the IP remote controller 10 receives the recordinglist and information of the program to be reproduced from the videorecorder 4, the process proceeds from step F411 to step F412. Then, onthe display section 11, the recording list is displayed and also, theinformation of the recorded program, which is selected for reproductionand which is currently being reproduced, is displayed in highlight.

FIG. 16 shows an example in which a recording list is displayed andalso, a program that is currently being reproduced from among therecording list is displayed so as to be distinguished from remainingpieces of content that can be output as highlight display HL.

As a result, the user becomes able to confirm, on the IP remotecontroller 10 side, the information on the recorded program that isbeing reproduced from the video recorder 4.

[6. Advantages of Embodiments and Modifications]

In the foregoing, various processing examples as embodiments have beendescribed. According to these embodiments, the following advantages canbe obtained.

First, when the channel of the television receiver 1 is changed, it ispossible to easily confirm the identity of the program that is currentlybeing output via the IP remote controller 10. As a consequence, thetrouble of searching for a newspaper or the like for the purpose ofconfirming the identity of the program is eliminated. Since informationincluding simple program content, performers and the like is containedin the EPG display, not only the program title but also those pieces ofinformation can be confirmed. Therefore, this is convenient in searchingfor a program desired to be viewed.

Furthermore, since information on programs and the like is displayed ina list, the identifies of other programs that are being broadcast at thesame time, which are not being viewed at that time, can be confirmed.Also in this regard, this is convenient in searching for a programdesired to be viewed.

Of course, identical processing is also performed when a program is tobe viewed using other television receivers 2 and 3. As a result,identical advantages can be obtained.

Furthermore, when reproduction is to be performed from the videorecorders 4 and 5, the program to be reproduced can be known via the IPremote controller 10. For example, when a certain user is reproducing arecorded program, it is also possible to confirm whether the recordedprogram is being viewed by a family of the user or the like by viewingthe content that is displayed in highlight in the recording list of theIP remote controller 10.

There are various operation methods for a channel change operation; forexample, the IP remote controller 10 can be used, the operation section44 of the television receiver 1 can be used, and the TV remotecontroller 7 can be used. As described above, in any of the operations,the program of the channel to be changed to can be confirmed via the IPremote controller 10. Therefore, it is not necessary for the user to beconcerned about which operation should be performed to change thechannel.

According to the processing example shown in FIG. 9, since EPG displayand highlight display HL of the program being viewed are performed whenthe channel is changed, it is possible for the user to confirm theprogram by merely viewing the IP remote controller 10 when the channelis changed without being concerned with the EPG display operation in theIP remote controller 10.

On the other hand, as shown in FIGS. 10A and 10B, by determining as towhether or not the EPG display and the highlight display should beperformed in response to the preference and necessity of the user,operations suitable for individual users can be performed.

As examples of an explicit display in the list display, highlightdisplay and enlarged display of the program in the EPG display, andrecording list display are shown. The present invention is not limitedto such a display mode.

In place of highlight display, display in which only the program isdisplayed by a different color, display in which the program issurrounded by a frame cursor, or display in which the program is made toblink may also be said to be explicit displays.

In the above-described examples, with regard to the television receiver1, an example in which the program is displayed in highlight when thechannel is changed is described. Also, for example, when the televisionreceiver 1 is switched on to start viewing, the program of the channelthat is output at that time may also be suitably displayed in highlight.In that case, the television receiver 1 need only to transmit, to the IPremote controller 10, the information on the channel being selected whenthe power is switched on.

Thereafter, as described in the above examples, since display control isperformed in response to the channel change, the IP remote controller 10enables the program currently being viewed to be continually confirmed.

EPG display and recording list display are given as examples of displayof programs to be viewed by means of the television receiver 1 and alist of programs recorded in the video recorder 4. It can also beassumed that content recorded on, for example, a CD, a DVD, a Blu-raydisc, and the like is displayed in a list so that the content isdisplayed so as to be distinguished from remaining pieces of contentthat can be output in response to the reproduction of particular contentand in response to changing of content to be reproduced.

When a plurality of IP remote controllers 10 are connected in thenetwork of FIG. 1, such processing as in the above-described examplesshould preferably be performed by all the IP remote controllers 10. Ofcourse, customization is preferable so that the processing can beperformed by only some of the IP remote controllers 10.

The IP remote controller 10 is given as an example of the informationdisplay apparatus according to the embodiment of the present invention.Alternatively, an apparatus other than the IP remote controller 10 mayfunction as an information display apparatus according to the embodimentof the present invention. For example, since a PDA (Personal DigitalAssistant), a personal computer, or a mobile phone performs processingdescribed as processing of the IP remote controller 10, the apparatuscan be realized as the information display apparatus according to theembodiment of the present invention.

Furthermore, in the network of FIG. 1, for example, the televisionreceiver 1 and the television receiver 2 may also alternately functionas a content output apparatus and an information display apparatusaccording to the embodiment of the present invention. For example, whena broadcast program is being viewed by means of the television receiver1, EPG display in which a program is displayed in highlight on thetelevision receiver 2 may be performed, whereas when a broadcast programis being viewed by means of the television receiver 2, EPG display inwhich a program is displayed in highlight on the television receiver 1may be performed.

Generally, the control operations and content selection functions areperformed in programmable circuitry that includes both hardware andsoftware. The circuitry should not however be construed in a limitingcontext, but should be construed broadly. For example, the functionalitycan be performed in a specially designed circuit, a programmablecircuit, or in software executed on a processor. Thus, selection andcontrol “sections” as discussed herein include both hardware, software,and hybrid embodiments.

It should be understood by those skilled in the art that variousmodifications, combinations, sub-combinations and alterations may occurdepending on design requirements and other factors insofar as they arewithin the scope of the appended claims or the equivalents thereof.

1. A content output system comprising: a content output apparatus; andan information display apparatus, the content output apparatus and theinformation display apparatus being capable of communicating with eachother, wherein the content output apparatus includes selection means forselecting, in response to a selection instruction, one piece of contentfrom among a plurality of pieces of content that are available foroutput, as content composed of a video signal and/or an audio signal;and an output port configured to output the one piece of contentselected by the selection means, and the information display apparatusincludes a display; and control means for allowing the display means todisplay, as content information display, information on the plurality ofpieces of content that are available for output from the content outputapparatus in a state in which the one piece of content that is outputfrom the output means of the content output apparatus is displayed so asto be distinguished from remaining pieces of content that are availablefor output.
 2. An information display apparatus comprising:communication means for communicating with external devices; a display;and control means for allowing the display to display, as a contentinformation display, information on a plurality of pieces of contentthat are available for output from a content output apparatus in a statein which a piece of content that is output from the content outputapparatus is displayed so as to be distinguished from remaining piecesof content that are available for output from the content outputapparatus, wherein the content output apparatus is external to theinformation display apparatus.
 3. The information display apparatusaccording to claim 2, further comprising: an operation mechanismconfigured to be user-actuated, wherein the control means allows thecommunication means to transmit a selection instruction in response tooperation of the operation mechanism to the content output apparatus inresponse to operation of the operation mechanism, makes a determinationas to what content is to be output by the content output apparatus onthe basis of the selection instruction in response to operation of theoperation mechanism, and allows the display to perform the contentinformation display in a state in which the content is displayed so asto be distinguished from remaining pieces of content that are availablefor output.
 4. The information display apparatus according to claim 2,wherein, by receiving, via the communication means, notificationinformation notifying what piece of output content is to be transmittedfrom the content output apparatus, the control means makes adetermination as to what content is to be output by the content outputapparatus and allows the display to perform the content informationdisplay in a state in which the content is displayed so as to bedistinguished from remaining pieces of content that are available foroutput.
 5. The information display apparatus according to claim 2,wherein the control means displays in highlights, as the contentinformation display, information regarding content that is output by thecontent output apparatus on a display of a list of a plurality of piecesof content that are available for output from the content outputapparatus.
 6. The information display apparatus according to claim 2,wherein the control means allows the display to display, as the contentinformation display, a list of a plurality of pieces of content that areavailable to be output from the content output apparatus, and display anenlarged version of information regarding content that is output fromthe content output apparatus.
 7. The information display apparatusaccording to claim 2, wherein, when display of a list of a plurality ofpieces of content that are available to be output from the contentoutput apparatus is being performed by the display, the control meansallows, in response to content output from the content output apparatus,the display to perform the content information display in a state inwhich content that is output by the content output apparatus isdisplayed so as to be distinguished from remaining pieces of contentthat are available for output.
 8. The information display apparatusaccording to claim 2, wherein, when display of a list of a plurality ofpieces of content that are available for output from the content outputapparatus is not being performed by the display, the control meansallows the display to perform the display of the list when changing ofcontent that is output by the content output apparatus or starting ofcontent output is detected, and allows the display to perform thecontent information display in a state in which content that is outputfrom the content output apparatus is displayed so as to be distinguishedfrom remaining pieces of content that are available for output.
 9. Theinformation display apparatus according to claim 8, wherein, whendisplay in a list of a plurality of pieces of content that are availablefor output by the content output apparatus is not being performed by thedisplay, the control means determines whether or not the display shouldperform the content information display in response to display settingwhen changing of content that is output by the content output apparatusor starting of content output is detected.
 10. A content outputapparatus comprising: communication means for communicating withexternal devices; selection means for selecting one piece of contentfrom among a plurality of pieces of content available for being output,as content composed of a video signal and/or an audio signal, inresponse to a selection instruction; output means for outputting thecontent selected by the selection means; and control means for allowingthe communication means to transmit, to an external device, notificationinformation of content that is selected by the selection means and thatis output by the output means.
 11. A content information display methodfor use with a content output system including a content outputapparatus, and an information display apparatus, the content outputapparatus and the information display apparatus being capable ofcommunicating with each other, the content information display methodcomprising the steps of: selecting and outputting one piece of contentfrom among a plurality of pieces of content stored in memory that areavailable for output from the content output apparatus, as contentcomposed of a video signal and/or an audio signal, in response to aselection instruction; and displaying information about the plurality ofpieces of content that are available for output from the content outputapparatus on the information display apparatus in a state in whichcontent that is output by the content output apparatus is displayed soas to be distinguished from remaining pieces of content that areavailable for output.
 12. A content output system comprising: a contentoutput apparatus; and an information display apparatus, the contentoutput apparatus and the information display apparatus being capable ofcommunicating with each other, wherein the content output apparatusincludes a selection section configured to select, in response to aselection instruction, one piece of content from among a plurality ofpieces of content that are available for being output, as contentcomposed of a video signal and/or an audio signal; and an output sectionconfigured to output the content selected by the selection section, andthe information display apparatus includes a display section; and acontrol section configured to allow the display section to display, ascontent information display, information on the plurality of pieces ofcontent that are available for output from the content output apparatusin a state in which content that is output from the output section ofthe content output apparatus is displayed so as to be distinguished fromremaining pieces of content that are available to be output.
 13. Aninformation display apparatus comprising: a communication sectionconfigured to communicate with external devices; a display section; anda control section configured to allow the display section to display, ascontent information display, information on a plurality of pieces ofcontent that are available to be output from a content output apparatusin a state in which content that is output from the content outputapparatus is displayed so as to be distinguished from remaining piecesof content that are available for output, wherein the content outputapparatus is an external device.
 14. A content output apparatuscomprising: a communication section configured to communicate withexternal devices; a selection section configured to select one piece ofcontent from among a plurality of pieces of content available to beoutput, as content composed of a video signal and/or an audio signal, inresponse to a selection instruction; an output section configured tooutput the content selected by the selection section; and a controlsection configured to allow the communication section to transmitnotification information of content that is selected by the selectionsection and that is output by the output section to an external device.15. A computer readable medium having contained therein computerreadable instructions that when executed by a processor perform stepscomprising: selecting and outputting one piece of content from among aplurality of pieces of content stored in memory that are available foroutput from a content output apparatus, as content composed of a videosignal and/or an audio signal, in response to a selection instruction;and displaying information on a display about the plurality of pieces ofcontent that are available for output from the content output apparatuson an information display apparatus in a state in which content that isoutput by the content output apparatus is displayed so as to bedistinguished from remaining pieces of content that are available foroutput, wherein the content output system includes a content outputapparatus, and the information display apparatus, the content outputapparatus and the information display apparatus being capable ofcommunicating with each other.
 16. The computer readable mediumaccording to claim 15, further including steps performed by theprocessor, comprising: transmitting a selection instruction in responseto operation of an operation mechanism to the content output apparatusin response to operation of the operation mechanism, determining whatcontent is to be output by the content output apparatus on the basis ofthe selection instruction in response to operation of the operationmechanism, and allowing the content information display to be displayedin a state in which the content is displayed so as to be distinguishedfrom remaining pieces of content that are available for output.
 17. Thecomputer readable medium according to claim 15, further including stepsperformed by the processor, comprising: receiving notificationinformation notifying what piece of output content is to be transmittedfrom the content output apparatus; determining what content is to beoutput by the content output apparatus; and allowing the contentinformation display to be displayed in a state in which the content isdisplayed so as to be distinguished from remaining pieces of contentthat are available for output.
 18. The computer readable mediumaccording to claim 15, further including steps performed by theprocessor, comprising: displaying in highlights, as the contentinformation display, information regarding content that is output by thecontent output apparatus on a display of a list of a plurality of piecesof content that are available for output from the content outputapparatus.
 19. The computer readable medium according to claim 15,further including steps performed by the processor, comprising:displaying, as the content information display, a list of a plurality ofpieces of content that are available to be output from the contentoutput apparatus, and displaying an enlarged version of informationregarding content that is output from the content output apparatus. 20.The computer readable medium according to claim 15, further includingsteps performed by the processor, comprising: when displaying of a listof a plurality of pieces of content that are available to be output fromthe content output apparatus is being performed by the display,allowing, in response to content output from the content outputapparatus, the display to perform the content information display in astate in which content that is output by the content output apparatus isdisplayed so as to be distinguished from remaining pieces of contentthat are available for output.